Besides our first article, you should also check out these other Steam games:
http://store.steampowered.com/app/108500/
http://store.steampowered.com/app/96400/
http://store.steampowered.com/app/94300/
http://store.steampowered.com/app/57300/
http://store.steampowered.com/app/208140/
http://store.steampowered.com/app/208140/
http://store.steampowered.com/app/33100/
http://store.steampowered.com/app/33110/
http://store.steampowered.com/app/33120/
http://store.steampowered.com/app/33130/
BTW, Alien Shooter, Alien Shooter: Revisited, Alien Shooter 2: Reloaded and Zombie Shooter are also available as a single package for $14.99 which means you actually buy 3, get one free. Pretty good…
http://store.steampowered.com/app/33180/
http://store.steampowered.com/app/211010/
http://store.steampowered.com/app/205910/